CN106481614A - Gas-liquid damping cylinder - Google Patents
Gas-liquid damping cylinder Download PDFInfo
- Publication number
- CN106481614A CN106481614A CN201610952841.1A CN201610952841A CN106481614A CN 106481614 A CN106481614 A CN 106481614A CN 201610952841 A CN201610952841 A CN 201610952841A CN 106481614 A CN106481614 A CN 106481614A
- Authority
- CN
- China
- Prior art keywords
- piston
- gas
- cylinder
- tracheae
- piston rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1428—Cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1457—Piston rods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/149—Fluid interconnections, e.g. fluid connectors, passages
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses a kind of gas-liquid damping cylinder, including cylinder barrel, slided in cylinder barrel successively and be provided with upper piston, spacing block and lower piston, inner cavity of cylinder is made to be separated into air cavity, upper oil cavitie, lower oil cavitie and lower air chamber, the passage of some connection upper oil cavities and lower oil cavitie is provided with spacing block, upper end is provided with cylinder barrel stretches out the piston rod outside cylinder barrel, the upper piston, lower piston difference is fixedly sleeved on the piston rod, piston rod is slidably connected with spacing block, a connection lower air chamber and extraneous lower gas port is provided with piston rod, the outside of piston rod is socketed with a upper vapour chamber of connection and extraneous tracheae.The cylinder barrel of gas-liquid damping cylinder of the present invention is structure as a whole or is only connected by spacing block, and therefore external structure is simple, it is easy to cleaned；In connection, the air inlet of the tracheae of air cavity and the upper gas port of the gas circuit for connecting lower air chamber are respectively positioned on same one end of gas-liquid damping cylinder so that gas-liquid damping cylinder easier for installation.
Description
Technical field
The invention belongs to general hydraulic technique and pneumatic technical field, and in particular to a kind of gas-liquid damping cylinder.
Background technology
The GMP workshop of pharmaceutical factory, the requirement to the cleanliness factor of equipment are higher, it is desirable to which the relevant part of equipment, health is nothing dead
Angle, it is easy to clean.
And for automatic scraper centrifuge, use the doctor blade device that Innerscoping cylinder drives at present, outside which
The oil pipe of access is more, in use and maintenance process, it is impossible to ensure that hydraulic oil is not leaked, so being difficult to reach this standard.
If the doctor blade device driven using built-in cylinder, although can reach clean easy cleaned requirement, but gas
The speed of cylinder piston rod stretching speed is wayward, easily causes centrifuge fault, is also accompanied by uncertain factor in safety.
The piston rod stretching speed for having a kind of gas-liquid damping cylinder, this gas-liquid damping cylinder on market is acted in hydraulic damping
Under, become stable, make it easy to control, but gas-liquid damping cylinder in the market, it is made up of the cylinder barrels of two series connection, and air inlet
Mouthful and gas outlet be separately positioned on the two ends that two cylinder barrels are relatively distant from, and two cylinder barrels be by outside addend root pull bar
Mode is fixed, and such external structure is complicated, causes not easy cleaning, it is difficult to be built in the inside for scraping girff.
Content of the invention
The technical problem to be solved is：There is provided that a kind of external structure is simple, piston rod stretching speed is stable
Gas-liquid damping cylinder.
For solving above-mentioned technical problem, the technical solution used in the present invention is：Gas-liquid damping cylinder, including tubulose cylinder barrel, cylinder
The upper end of cylinder is provided with cylinder plug, and lower end is sealedly connected with bottom, it is characterised in that from up to down slides successively in the cylinder barrel and sets
Upper piston and lower piston is equipped with, between upper piston and lower piston, is provided with the spacing block being fixedly connected in cylinder barrel, the upper work
Inner cavity of cylinder is separated into the cavity of four sealings for plug, spacing block and lower piston, and four cavitys are from up to down respectively upper gas
Chamber, upper oil cavitie, lower oil cavitie and lower air chamber, are provided with the passage of some connection upper oil cavities and lower oil cavitie, institute on the spacing block
State and the piston rod for sequentially passing through cylinder plug, upper piston, spacing block and lower piston in cylinder barrel, is provided with, cylinder barrel is stretched out in the piston rod upper end
Outward, the upper piston, lower piston difference fixedly sleeved piston rod is slidably connected with spacing block on the piston rod, set in piston rod
A gas circuit is equipped with, and the gas circuit forms the lower gas port of connection lower air chamber, gas formed on the top of piston rod in piston-rod lower end
Mouthful, the outside of the piston rod is socketed with a upper vapour chamber of connection and extraneous tracheae, and the tracheae is through the upper air cavity of cylinder plug insertion
Interior, the upper end of tracheae is tightly connected with piston rod outer wall, and tracheae outer wall is sealed slidingly against with cylinder plug and is connected, the tracheae upper end
Offer air inlet.
Used as a kind of preferred scheme, the number of channels on the spacing block is two, is respectively arranged with every passage
One-way throttle valve, the setting direction of two one-way throttle valves are contrary.
Used as a kind of preferred scheme, the cylinder barrel includes the upper shell being coaxially disposed and lower shell, the lower end of upper shell
It is tightly connected with the top half of spacing block, the upper end of lower shell is tightly connected with the latter half of spacing block.
Used as a kind of preferred scheme, the groove being provided with the cylinder plug lower surface with diameter greater than tracheae external diameter, this is recessed
Groove is coaxially disposed with tracheae, makes to form gap around tracheae between cylinder plug, and the lower end of the tracheae is close with upper piston upper surface
Envelope is fixedly connected, and is provided with gas outlet on tracheae lower sides, the depth for being smaller than groove of the gas outlet and upper piston.
As a kind of preferred scheme, two nuts on the outer wall of the tracheae upper end, are threaded with.
Used as a kind of preferred scheme, the piston-rod lower end is flushed with lower piston lower surface.
The invention has the beneficial effects as follows：The cylinder barrel of gas-liquid damping cylinder of the present invention is structure as a whole or only by dividing
Spacer block connects, and therefore external structure is simple；Upper oil cavitie and lower oil cavitie pass through channel connection, and arrange unidirectional fuel-economizing in passage
Valve, it is ensured that piston rod stretching speed is stable；The upper gas port of the air inlet of the tracheae of air cavity and the gas circuit for connecting lower air chamber in connection
Be respectively positioned on same one end of gas-liquid damping cylinder, more so that gas-liquid damping cylinder easier for installation.
Description of the drawings
Fig. 1 is the structural representation of the present invention.
In Fig. 1：1st, cylinder barrel, 1-1, upper shell, 1-2, lower shell, 2, cylinder plug, 3, bottom, 4, upper piston, 5, lower piston, 6,
Spacing block, 7, upper vapour chamber, 8, upper oil cavitie, 9, lower oil cavitie, 10, lower air chamber, 11, passage, 12, piston rod, 13, gas circuit, 14, lower gas
Mouthful, 15, upper gas port, 16, tracheae, 17, air inlet, 18, one-way throttle valve, 19, groove, 20, gas outlet, 21, nut, 22, sliding
Set.
Specific embodiment
Below in conjunction with the accompanying drawings, specific embodiments of the present invention are described in detail.
Gas-liquid damping cylinder as shown in Figure 1, including tubulose cylinder barrel 1, the cylinder barrel is by the upper shell 1-1 being coaxially disposed and lower cylinder
Body 1-2 is constituted, and is sealedly connected with spacing block 6 between upper shell 1-1 and lower shell 1-2, and the upper end of upper shell 1-1 is provided with cylinder plug
The lower end of 2, lower shell 1-2 is sealedly connected with bottom 3, and sliding in upper shell 1-1 is provided with upper piston 4, slides in lower shell 1-2
Lower piston 5 is provided with, between the upper piston 4 and cylinder plug 2, forms closed upper air cavity 7, shape between upper piston 4 and spacing block 6
Become closed upper oil cavitie 8, closed lower oil cavitie 9 between spacing block 6 and lower piston 5, is formed, formed between lower piston 5 and bottom 3
Closed lower air chamber 10, is provided with the passage 11 of two connection upper oil cavities 8 and lower oil cavitie 9, for hydraulic oil on the spacing block 6
Flow between upper oil cavitie 8 and lower oil cavitie 9, passage 11 reduces the flowing velocity of hydraulic oil, become 12 rising or falling speed of piston rod
Steady.
The piston rod 12 for sequentially passing through cylinder plug 2, upper piston 4, spacing block 6 and lower piston 5, the work are additionally provided with cylinder barrel 1
12 upper end of stopper rod is stretched out outside cylinder barrel 1, and the upper piston 4, lower piston 5 are fixedly connected with piston rod 12 respectively, piston rod 12 with point
Spacer block 6 is slidably connected, and is provided with a gas circuit 13 in piston rod 12, and the gas circuit 13 forms connection lower air chamber in 12 lower end of piston rod
10 lower gas port 14, form gas port 15 on the top of piston rod 12, with connect lower air chamber 10 with extraneous；The piston rod 12
Outside is socketed with a upper vapour chamber 7 of connection and extraneous tracheae 16, and the tracheae 16 is passed through in the upper air cavity 7 of the insertion of cylinder plug 2, tracheae 16
Gap is left between piston rod 12 with ventilating air, the upper end of tracheae 16 is tightly connected and in tracheae 16 with 12 outer wall of piston rod
Air inlet 17 is provided with the wall of side, and 16 outer wall of tracheae is sealed slidingly against with cylinder plug 2 by sliding sleeve 22 and is connected 7, and sliding sleeve 22 is fixed
It is arranged in cylinder plug 2.
When cylinder barrel 1 is relatively large in diameter, cylinder 1 may be selected integral type, and spacing block is directly welded inside cylinder 1, to carry
The globality of high enterprise's damped cylinder cylinder barrel outer wall, improves sealing effectiveness.
Actual design and production in, spacing block is double polarizing keys structure small in ends broad in the middle, two ends boss respectively with upper
The inner wall sealing connection of cylinder 1-1 and lower shell 1-2, the diameter phase of the diameter of mid portion and upper shell 1-1 or lower shell 1-2
Same, it is beneficial to cleaning, reduces the knuckle of gas-liquid damping cylinder outer surface, be beneficial to cleaning.
On above-mentioned spacing block 6, in two passes 11, one-way throttle valve 18, the setting of two one-way throttle valves 18 is respectively arranged with
In opposite direction, one-way throttle valve 18 is used for adjusting the flow velocity of hydraulic oil, so that piston rod 12 is lifted with steady.
The groove 19 being provided with 2 lower surface of cylinder plug with diameter greater than 16 external diameter of tracheae, the groove 19 are same with tracheae 16
Axle is arranged, and makes to form gap between tracheae 16 and cylinder plug 2, and the lower end of the tracheae 16 is fixing with the sealing of 4 upper surface of upper piston to be connected
Connect, on 16 lower sides of tracheae, gas outlet 21 is provided with, the depth for being smaller than groove 19 of the gas outlet 21 and upper piston 4,
When move on upper piston 4 be affixed with 2 bottom surface of cylinder plug when, gas outlet 21 be located at gap in, prevent gas outlet 21 to be blocked.
Two nuts 22 are threaded with 16 upper end outer wall of the tracheae, for the fixation of piston rod 12.
12 lower end of the piston rod is flushed with 5 lower surface of lower piston, prevents bottom 3 from damaging because of the impact of 12 lower end of piston rod
Evil.
The operation principle of the present invention is：As air inlet pipeline is arranged on piston rod 12 and tracheae 16, therefore using
When, 16 upper end of tracheae is fixed on other supports, when 15 air inlet of upper gas port, gases at high pressure enter lower air chamber 9, lower air chamber 9 expands
, promote cylinder barrel 1 to move down, the hydraulic oil in lower oil cavitie 9 enters passage 11, applies pressure to one-way throttle valve 18, due to
Two one-way throttle valves 18 are oppositely arranged, and therefore, the one-way throttle valve 18 having in a passage 11 is promoted and beaten by hydraulic oil
Opening, making hydraulic oil be able to upper oil cavitie 8 be flowed into from the passage 11, and upper air cavity 7 is while reducing, internal gas pass through air inlet
17 discharge；
In the same manner, when 17 air inlet of air inlet, above-mentioned action is contrary.
Due to the same one end of upper gas port and air inlet in gas-liquid damping cylinder, and gas-liquid damping cylinder outer surface structure is simple,
Therefore, cleaning get up very convenient, but also drastically increase the gas-liquid damping cylinder be used in centrifugal machine scraper device on just
Victory.
Claims (6)
1. gas-liquid damping cylinder, including tubulose cylinder barrel (1), the upper end of cylinder barrel (1) is provided with cylinder plug (2), and lower end is sealedly connected with bottom
Lid (3), it is characterised in that from up to down slide successively in cylinder barrel (1) and be provided with upper piston (4) and lower piston (5), upper work
The spacing block (6) being fixedly connected in cylinder barrel (1), upper piston (4), spacing block are provided between plug (4) and lower piston (5)
(6) and cylinder barrel (1) inner chamber is separated into lower piston (5) cavitys of four sealings, four cavitys are from up to down respectively upper gas
Chamber (7), upper oil cavitie (8), lower oil cavitie (9) and lower air chamber (10), are provided with some connection upper oil cavities on spacing block (6)
(8) and lower oil cavitie (9) passage (11), be provided with cylinder barrel (1) and sequentially pass through cylinder plug (2), upper piston (4), spacing block
(6) and lower piston (5) piston rod (12), the piston rod (12) upper end stretches out cylinder barrel (1) outward, upper piston (4), lower piston
(5) fixedly sleeved on piston rod (12) respectively, piston rod (12) is slidably connected with spacing block (6), is arranged in piston rod (12)
There is a gas circuit (13), the gas circuit (13) forms the lower gas port (14) of connection lower air chamber (10), living in piston rod (12) lower end
The top of stopper rod (12) forms gas port (15), the outside of piston rod (12) be socketed with the upper vapour chamber (7) of connection with outer
The tracheae (16) on boundary, the tracheae (16) are interior through the upper air cavity (7) of cylinder plug (2) insertion, the upper end of tracheae (16) and piston rod (12)
Outer wall is tightly connected, and tracheae (16) outer wall is sealed slidingly against with cylinder plug (2) and is connected, and tracheae (16) upper end offers air inlet
Mouth (17).
2. gas-liquid damping cylinder according to claim 1, it is characterised in that passage (11) quantity on spacing block (6)
For two, in every passage (11), one-way throttle valve (18) is respectively arranged with, the setting direction of two one-way throttle valves (18) is contrary.
3. gas-liquid damping cylinder according to claim 1, it is characterised in that described cylinder barrel (1) includes the top cylinder being coaxially disposed
Body (1-1) and lower shell (1-2), the lower end of upper shell (1-1) are tightly connected with the top half of spacing block (6), lower shell (1-
2) upper end is tightly connected with the latter half of spacing block (6).
4. gas-liquid damping cylinder according to claim 1, it is characterised in that be provided with diameter on cylinder plug (2) lower surface
More than the groove (19) of tracheae (16) external diameter, the groove (19) is coaxially disposed with tracheae (16), make tracheae (16) and cylinder plug (2) it
Between formed gap, the lower end of tracheae (16) is sealedly and fixedly connected with upper piston (4) upper surface, on tracheae (16) lower sides
It is provided with gas outlet (21), the depth for being smaller than groove (19) of the gas outlet (21) and upper piston (4).
5. gas-liquid damping cylinder according to claim 1, it is characterised in that threaded on the outer wall of tracheae (16) upper end
There are two nuts (22).
6. according to the arbitrary described gas-liquid damping cylinder of Claims 1 to 5, it is characterised in that piston rod (12) lower end with
Piston (5) lower surface flushes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610952841.1A CN106481614B (en) | 2016-11-03 | 2016-11-03 | gas-liquid damping cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610952841.1A CN106481614B (en) | 2016-11-03 | 2016-11-03 | gas-liquid damping cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106481614A true CN106481614A (en) | 2017-03-08 |
| CN106481614B CN106481614B (en) | 2018-01-02 |
Family
ID=58272907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610952841.1A Active CN106481614B (en) | 2016-11-03 | 2016-11-03 | gas-liquid damping cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106481614B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108331797A (en) * | 2018-03-28 | 2018-07-27 | 徐工集团工程机械有限公司 | A kind of sand throwing extinguishing vehicle feeding equipment oil cylinder |
| CN112727978A (en) * | 2021-01-22 | 2021-04-30 | 保定市东利机械制造股份有限公司 | Damping self-adaptation automobile shock absorber ware |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1286060A1 (en) * | 2001-08-14 | 2003-02-26 | A. Römheld GmbH & Co. KG | Cylinder with piston speed damping |
| CN201396335Y (en) * | 2009-06-04 | 2010-02-03 | 上海申光高强度螺栓有限公司 | Gas-liquid damping cylinder |
| CN202468528U (en) * | 2012-03-01 | 2012-10-03 | 阜新伟光液压气动有限公司 | Multifunctional composite cylinder |
| CN203098457U (en) * | 2013-02-01 | 2013-07-31 | 上海尊优自动化设备有限公司 | Gas-liquid pressure cylinder |
| CN203702721U (en) * | 2013-12-10 | 2014-07-09 | 北京理工大学 | Mould moving and mould locking integrated closing oil cylinder structure |
| CN204113801U (en) * | 2014-09-28 | 2015-01-21 | 北京建筑大学 | A kind of damping device |
| CN206144902U (en) * | 2016-11-03 | 2017-05-03 | 苏州盛天力离心机制造有限公司 | Gas -liquid damping jar |
-
2016
- 2016-11-03 CN CN201610952841.1A patent/CN106481614B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1286060A1 (en) * | 2001-08-14 | 2003-02-26 | A. Römheld GmbH & Co. KG | Cylinder with piston speed damping |
| CN201396335Y (en) * | 2009-06-04 | 2010-02-03 | 上海申光高强度螺栓有限公司 | Gas-liquid damping cylinder |
| CN202468528U (en) * | 2012-03-01 | 2012-10-03 | 阜新伟光液压气动有限公司 | Multifunctional composite cylinder |
| CN203098457U (en) * | 2013-02-01 | 2013-07-31 | 上海尊优自动化设备有限公司 | Gas-liquid pressure cylinder |
| CN203702721U (en) * | 2013-12-10 | 2014-07-09 | 北京理工大学 | Mould moving and mould locking integrated closing oil cylinder structure |
| CN204113801U (en) * | 2014-09-28 | 2015-01-21 | 北京建筑大学 | A kind of damping device |
| CN206144902U (en) * | 2016-11-03 | 2017-05-03 | 苏州盛天力离心机制造有限公司 | Gas -liquid damping jar |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108331797A (en) * | 2018-03-28 | 2018-07-27 | 徐工集团工程机械有限公司 | A kind of sand throwing extinguishing vehicle feeding equipment oil cylinder |
| CN108331797B (en) * | 2018-03-28 | 2023-12-08 | 江苏徐工工程机械研究院有限公司 | Oil cylinder for feeding device of sand throwing fire extinguishing vehicle |
| CN112727978A (en) * | 2021-01-22 | 2021-04-30 | 保定市东利机械制造股份有限公司 | Damping self-adaptation automobile shock absorber ware |
| CN112727978B (en) * | 2021-01-22 | 2023-01-06 | 保定市东利机械制造股份有限公司 | Damping self-adaptation automobile shock absorber ware |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106481614B (en) | 2018-01-02 |
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